Malicious PDF — malware analysis report

Static analysis result for SHA-256 1573fae1f6d52dd6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 19:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4cdae0614ff22aa9f20ceef97ff6d5d SHA-1: ba90b4680753c2244baa9027ca10d0e1d43db660 SHA-256: 1573fae1f6d52dd6355bdd5e1e48edc4256124aafbc1fb85fb0d63335627f742
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=collectables+ffxiv+guide', is flagged as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=collectables+ffxiv+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
    • https://static.usrfiles.com/ugd/8b49c6_3c19f6fdc5ce429d9451c91ec2586993.pdf
    • https://static.usrfiles.com/ugd/be19e1_27e8b94dc3fc4eee98e6d90460904622.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_65186015dc78464c9aa8b34066481d2b.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/36556041098.pdf
    • https://cdn.shopify.com/s/files/1/0457/7178/4358/files/bottomnavigationview_example_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/2147/3691/files/big_o_notation_examples_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/mewonipatemetukitefonawev.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/jelivosujofi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/gonof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/car_aircon_troubleshooting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/pewovugadame.pdf
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/58630625506.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d59396c198f4cf39d4cf8d6817daf74.pdf
    • https://static.usrfiles.com/ugd/fedf23_ec426587029e4c2397312baa5b3ea84e.pdf
    • https://static.usrfiles.com/ugd/e02969_91b639fe2b334f5cb09d80970874c383.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e36.bin
ac0bebde7437aeccef91892802d917360ccbf2be6e0d2fa25d5414a8269f38e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 5264 bytes
font_01_sfnt_off00008039.bin
a4ce27d8727c00e1f4a985152d2e25eb57a2c270a47899ad93fcac7e34d2bd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8039 10096 bytes

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